aₙ = n²/2ⁿ ; a₇ - NCERT Class XI Mathematics

NCERT Class XI Mathematics - Sequences and Series - Solutions

Question : 8 of 106

Marks: +1, -0

a_n

\frac{n^2}{2^n} ; a_7

Solution:

We have,

a_n

\frac{n^2}{2^n} ; a_7

Put n = 7 ,

a_7

\frac{(7)^2}{2^7}

\frac{49}{128}

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